slony: specify --with-pgcofigdir

Fixes #https://github.com/mxcl/homebrew/issues/25016
libraw 0.15.4

Fixes #25038.
Pass deps collection to be expanded as a parameter
Use separate collection for requirement deps
Move dependency expansion logic up one level
Rename filter_deps to expand_dependencies
Compute recursive deps for default_formula deps
Ensure option names are consistent for default formula requirements
rearrange